WU, T. S. Expansive Automorphisms in Compact Groups. MATHEMATICA SCANDINAVICA, [S. l.], v. 18, p. 23–24, 1966. DOI: 10.7146/math.scand.a-10776. Disponível em: https://tidsskrift.dk/math/article/view/10776. Acesso em: 13 aug. 2026.